Method of making a multilayer inductor

Abstract

In the multilayer inductor, the substrate thereof is composed of a constituent belonging to spinel ferrite, and is furnished with internal conductors of a main constituent being silver at the interior of the substrate. The internal conductors are drawn outside of the substrate, and the drawn portions are provided with external electrodes. The internal conductors contain manganese and bismuth, and the manganese and bismuth contents at an interface between the internal conductors and the substrate are more than those of other ranges. MnO 2 of 0.02 to 0.1 wt % and Bi 2 O 3 of 0.5 to 1.2 wt % are added to a paste of the main constituent being silver to be used to the internal conductors, and the paste is baked together with spinel ferrite material.

1. A method of making a multilayer inductor comprising
 adding 0.02 to 0.1 wt % MnO 2  and 0.5 to 1.2 wt % Bi 2 O 3  to a paste corn rising silver to yield an internal conductor paste;  
 drawing the internal conductor paste outside of a substrate; and  
 baking the internal conductor paste and the substrate.  
 
     
     
       2. The method of  claim 1 , wherein the MnO 2  is added in amount of 0.05 to 0.07 wt %. 
     
     
       3. The method of  claim 2 , wherein the Bi 2 O 3  is added in amount of 0.8 to 1.0 wt %. 
     
     
       4. The method of  claim 1 , wherein the Bi 2 O 3  is added in amount of 0.8 to 1.0 wt %. 
     
     
       5. The method of  claim 1 , wherein the paste comprises a silver-palladium alloy. 
     
     
       6. The method of  claim 1 , wherein the substrate is a spine ferrite material. 
     
     
       7. The method of  claim 6 , wherein the spinel ferrite material is a NiCuZnFe 2 O 4  based component.